⏳ Hopper Orifice Clogging: Avalanche Size Statistics (2D)

Side view of a hopper in which every grain reaching the orifice has a small chance to lock into an arch and stop the flow, so the number of grains that pass between clogs is random. Set the orifice to grain size ratio, the grain friction, the flow rate and the number of grains, and see the clog chance per grain, the mean avalanche, the chance to empty the whole hopper without a clog and the size ratio above which clogs become rare. The mean avalanche, the survival law, the spread and the safe ratio are checked numerically, with four in-page numerical checks.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install